LEUKOCYTOSIS

Approach to the patient: Leukocytosis

Review smear (are abnormal cells present?) and obtain differential count. The normal values for concentration of blood leukocytes are shown in Table 64-1.

TABLE 64-1: Normal Values for Leukocyte Concentration in Blood
CELL TYPE	MEAN, CELLS/μL	95% CONFIDENCE INTERVALS, CELLS/μL	TOTAL WBC, %
Neutrophil	3650	1830–7250	30–60
Lymphocyte	2500	1500–4000	20–50
Monocyte	430	200–950	2–10
Eosinophil	150	0–700	0.3–5
Basophil	30	0–150	0.6–1.8

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